(a) The board shall organize by electing one (1) of its members chairman, and it shall select a secretary. It may also employ such agents, servants, engineers, and attorneys as it deems best and fix their compensation and the compensation of the secretary.
(b) In case of a vacancy on the board of commissioners, after the commissioners have organized, the remaining commissioners shall select the successor, who shall be a property holder in the district. The person so selected shall qualify by taking the oath of office as prescribed for the original commissioners.